10-15 months - first vocalizations begin to appear
1-2 months - infant distinguish between speech and nonspeech.
phonology - describes sounds used in any particular language
pragmatics - relationship between language and the user.
16-18 months - vocalizations have several communicative intents
Doorways - ADA ACCESS STANDARDS - 32" WIDE
slope of a ramp - 1:12
minimum clear width of a ramp - 36"
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